Pounce bag for dusting molds



Agg. 29, 1950 G. E. F. sAUM 2,520,343

POUNCE BAG FOR DUSTING MOLDS Filed April 22, 1948 2 Sheets sheet l @edzam,

Patented Aug. 29, 1950 UNITED. N STATES PATENT OFFICE 2,520,343 PONCEBAG FOR DUSTING MOLDS IGreorge E. F. Saum, Chicago, Ill. u ApplicationApril 22, 1948, Serial No. 22,641

In order to secure acceptable results, molds for use in the formation ofthermoplastic materials require frequent lubrication through theapplication of a powder. Generally the material powdered for such use iszinc stearate.

f Heretofore it has been the practice to place a quantity of this powderon a piece of cloth-usually arag or material discarded from otherusesand after drawing the perimetrical portions together tying and/ortaping the gathered portions to provide a grip for the hand to permitthe banging of the powder bag against the mold. All too often this haspresented problems. Such cloth as would permit the sifting of the powderwould result in an excess emission of powder onto the mold. Notinfrequently such cloth has been of such a nature asto be easily injuredby the mold, resulting in the cloth breaking. When that happens a moldbecomes fouled with an excessive amount of powder, too often resultingin defective pieces being produced by the subsequent use of the mold.Moreover, aside from the waste, the dust gets into the press bearings,causing excessive wear, and the air becomes filled with dust which isdetrimental to the health of workmen.

` The main objects of this invention, therefore, are to provide animprovedforin of` pounce bag for use in dusting molds, particularlymetal molds used for `forming thermoplastic materials; toa provide animproved bag of this kind capable of eecting an even and uniform siftingof the powder but so formed as to long resist deterioration with itsconsequentexcessive emission of powder and breaking of the bag resultingfrom extended recurring striking thereof against the corners, edges, andprotuberances of `the mold` coniigurations; to provide an improved bagconstruction of this kind comprising superimposed layers of fabric ofdiffering characteristics of thread one of which is adapted to sift thepowder and the other of which is adapted to resist wear; to provide` animproved fabric arrangement of this kind the perimetricalportions ofwhich can be gathered to enclose the powder and form a hand gripconvenient for holding the bag during the pouncing operation; ftoprovide improved draw-string means for gathering the perimetricalportions of said layers of cloth to form the bag and lacing the sametogether so asto make highly convenient the filling, closing, andsubsequent relling of the bag; and to provide an improved pounce bag ofthis kind which is inexpensive to make,` efficient in use, and of `greatdurability.

In the"`drawings,

Claims. ('Cl. 15--131.1)

Fig. l is a perspective view of a preferred `form of pounce bag,constructed in `accordance with this invention, the perimetrical`portions being laced together as they would normally he to enclose thepowder and form a hand grip.,` When initially filled with powder the bagpart would have a much more extended bag part than here shown;

Fig. 2 is a plan view of the ungathered superimposed layers of cloth asviewed from the exposed side of the coarser material, the ends of adraw-string enclosed in a, perimetrical casing being threaded throughthe end eyelets in the tucks bordering the radially-disposed gore;

Figf3 is a similar view taken from the opposite or inside of thesuperimposed layers;

, Fig. 4 is an enlarged diagrammatic cross-sectional view of the goreand tucks taken on the line 4-4 of Fig. 2; u

Fig.` 5 is an enlarged diagrammatic cross-sooftional view` of theperimetrical portion of the superimposed layers, taken on the line 5-5of Fig. 2;

` Fig. `6 is a view similar to Fig. 2 showing a modified arrangement ofthe draw-string;

Fig. 7 is an opposite or inside view of the same;`

Fig. 8 is a perspective view similar to Fig. 1 but showing the form thefolds take with the modified arrangement of` the draw-string shown inFigs. 6 and 7 Fig. 9 is anenlarged diagrammatic cross-sectional view ofthe gore and tucks for the modica# tion shown in Fig. 6, taken on theline 9-9 of Fig. 6; and

Fig. 10 is an enlarged diagrammatic cross-sectional view of theperimetrical portion of the modiiication shown in Fig.` 6, taken on theline leamoitie 6.

A pounce bag constructed in accordance with this invention comprises twosuperimposed circular layers of cloth Ii `and l2 stitched togetheraround their `perimetrical portions and also stitched together alonglines nearly radial to form a radially-disposed gore section i3 borderedby tucks i4. A draw-string I5, threaded through the perimetricalportions of these superimposed layers and through the tucks I4, isadapted to gather said perimetrical portions together to form a bag orcontainer for powder and provide a hand grip for convenient use inholding the bag when striking it against the mold so as to sift powderon the surfaces thereof.

The layers of fabric II and l2 are of different character, one designedto serve as a sieve, the 0th?? 159 ,IGSS Wear. To that end the innerlayer I I is formed of comparatively fine threads, whereas the outerlayer I2 is formed of coarser threads. The inner layer iI is thus afabric much like that from which flour sacks are made, through which thepowdered material is adapted to be sifted. On the other hand, the outerlayer i2 is a fabric in the nature of light duck or canvas. This outerlayer I2 has far greater durability and resistance to wear than does theinner layer II, thus providing an extended life for the bag.

In the preferred form, as shown in Figs. 1 to 5 inclusive, the stitchingof the layers around their perimetrical portions is such as to provide acasing I' in which to contain the lacing or drawstring I5.

In the modified form, as shown in Figs. 6 to 10 inclusive, the sameperimetrical stitching is provided. However, eyelets I'I are securedlaround this perimetrical casing portion ofv the layers atcircumferentially spaced points.

The gore section I3 is formed by stitching the layers together alongnearly parallel and substantially radially-disposed lines so as to form`a, section within which the gathered perimetrical portions of thesuperimposed layers may be drawn by the draw-string I5. In eithermodification, spaced eyelets I8 are xed in the tucks I through which thedraw-string I5 may be threaded. y

The lacing or draw-string l5 is of conventional character and, asindicated, may either be enclosed in the perimetrical casing I6 as shownin Fig. 5 or threadedthrough the perimetrical eyelets I'I, asl shown inFigs. o, 7, and 8, with the free ends in either case threaded throughopposite eyelets I8 formed in the tucks I 4.

A pounce bag constructed in accordancel with either of lthemodifications herein shown is used in the following manner. l

A quantity of powdered material is placed in the center f the innerlayer of clothII. The Surrounding perim'etrical portion of the layers isgathered up around the powdered material and -the draw-string I drawn upto bring the perimetrical portions close together. I The ends of thedraw-string are then threade'dthrough the eyelets I'B in the tucks Illembracing the gatheredportion of the layers. As the string I5 is drawnup the gathered portion of the layers II and I2 is compressed into thespace between the tucks I4,- and provides -a hand grip which may begrasped for striking the bag part against the mold so as to sift thepowder onto the surfaces thereof. When it is desired to replenish thepowder in a bag of this character it may be very conveniently done bysimply unlacing the drawstring I5, pulling apart the gatheredperimetrical portions, pouring a quantity of powder, and again drawingup the lacing I 5. a

Other variations and modifications in the details of structure andarrangement of the parts may be resorted to within the spirit andcoverage of the appended claims.

I claim:

1. A pounce bag for use in dusting molds comprising superimposedcoextensive layers of powder-pervious woven fabric one of which layersis formed of comparatively fine threads adapted primarily to provide asifter for powder and the other of which layers is formed of threadscomparatively tougher than the threads for said one layer and therebyadapted to provide a covering with a high capacity for resisting wearcaused byvstriking the bag against the mold, and means for gatheringth-e perimetrical portions of Said 4 superimposed layers of fabric toform a container for the powder and provide a hand grip by which to holdthe pounce bag when striking the mold.

2. A pounce bag for use in dusting molds comprising superimposedcoeXtensive circular layers of powder-pervious woven fabric one of whichlayers is formed of comparatively ne threads and woven primarily toprovide a sifter for powder and the other of which layers is formed ofthreads and a weave adapted to provide a covering with a maximumcapacity for resisting wear caused by striking the bag against the mold,said layers being stitched together along their perimetrical portions toform a casing, and a drawstring -arranged in said casing to permit thegathering of the perimetrical portions of said superimposed layers offabric to form a container for the powder and provide a hand grip bywhich to hold the pounce bag when striking the mold. Y

3. A pounce bag for use in dusting molds comprising `superimposedcoextensive circular layers of powder-pe'rvious woven fabric one ofwhich layers is formed of comparatively ne threads and woven primarilyto provide a sifter for powder and the other of which layers is formedof threads and a weave and adapted to provide a covering with a maximumcapacity for resisting wear caused by striking the bag against the mold,said layers being stitched together to forma radially-disposed goresection bordered by tucks', eyelets formed in said tucks and adraw-string slidably attached t0 the perimeter of said superimposedlayers and adapted to be `threaded through the eyelets in said tuckswhereby Ythe drawing of said string will gather the perimetricalportions of said superimposed layers .of fabric to form a container forthe powder and fold the gathered portion of said layers. between saidtucks' so as to provide a hand grip by which to hold the pounce bag whenstriking the mold.

L A pounce bag for use in dusting molds comprising superimposedcoextensive circular layers of powder-pervious woven fabric one of whichlayers is formed of comparatively fine threads closely woven so that itis adapted to sift vpowder therethrough and the other of which layers isformed of coarser threads than the threads for said one layer andlikewise closely woven and adapted to provide a covering with a maximumcapacity `for resisting wear caused by striking the bag against themold, said layers being stitched togetherto' form a radially-disposedgore section bordered by tucks, eyelets formed in said tucks and in theperimetrical portions of said superimposed fabrics, and a draw-stringthreaded through the eyelets in said perimetrical portion and adapted tobe threaded through the -eyelets in said tucks whereby the drawing ofsaid string will gather the perimetrical portions of said superimposedlayers of fabric to form a container for the powder arid fold theVgathered portion of said layers between said tucks so as to provide ahand grip by which to` hold the pounce bag when striking the mold.

5. A pounce bag for use in dusting molds, comprising superimposed,coextensive, circular layers of powder-pervious woven fabric, one ofwhich layers is formed of iine threads and Woven primarily to provide asifter for powder and the other of which layers is formed of threads anda weave adapted to provide a covering with maximum capacity forresisting wear caused striking the bag against the mold, said layegg 5 6ing stitched together to form a radially-disposed REFERENCES CITED goresection bordered by tucks eyelets formed The following references are ofrecord in the in said tucks, and a draw-string threaded fue of thispatent: through the eyelets of said tucks, whereby the drawing of saidstring will gather the perimetri- 5 UNITED STATES PATENTS cal portionsof said superimposed layers of fab- Number Name Date ric to form acontainer for the powder and fold 303,848 Hill Aug. 19, 1884 thegathered portion of said layers between said 471,680 Bailey Mar. 29,1892 tucks so as to provide a hand grip by which to 919,065 Page Apr.20, 1909 hold the pounce bag when striking the mold. 10 1,424,649 KrohnAug. 1, 1922 GEORGE E. F. SAUM

